Waves Test - 68...

Two pulses in a stretched string whose centres are initially 8 cm apart are moving towards each other as shown in Fig. 7.80. The speed of each pulse is 2 cm/s. After 2 s the total energy of the pulses will be

n waves are produced on a string in 1 s. When the radius of the string is doubled and the tension is maintained the same, the number of waves produced in 1 s for the same harmonic will be

One end of a 2.4 m string is held fixed and the other end is attached to a weightless ring that can slide along a frictionless rod as shown in Fig. 7.86. The three longest possible wavelength for standing waves  in this string are respectively

Which of the following travelling wave will produce standing wave, with nodes at x = 0, when superimposed on $$y = A \sin{(\omega t - kx)}$$

Let the two waves $$y_1 = A \sin {(kx - \omega t)}$$ and $$y_2 = A \sin {(kx + \omega t)}$$ form a standing wave on a string. Now if an additional phase difference of $$\phi$$ is created between two waves, then

Microwaves from a transmitter are directed normally towards a plane reflector. A detector moves along the normal to the reflector. Between positions of 14 successive maxima, the detector travels a distance 0.14 m. If the velocity of light is $$ 3 \times 10^{8}$$ m/s, find the frequency of the transmitter.

Which of the following are transferred from one place to another place by the waves ? 

Two waves are given by $$y_1 = a \sin \left (\omega t - kx \right )$$ and $$y_2 = a \cos \left (\omega t - kx \right )$$. The phase difference between the two waves is

If amplitude of waves at distance r from a point source is A, the amplitude at a distance 2r will be

Two waves are propagating to the point $$P$$ along a straight line produced by two sources $$A$$ and $$B$$ of simple harmonic and of equal frequency. The amplitude of every wave at $$P$$ is $$a$$ and the phase of A is ahead by $$\dfrac{pi}{3}$$ than that of $$B$$ and the distance $$AP$$ is greater than $$BP$$ by 50 $$cm$$. Then the resultant amplitude at the point $$P$$ will be, if the wavelength is 1 meter

[BVP 2003]